1 Answer

To start with you'll need to get another USB thumb drive and then from a working Mac prep it up as a bootable OS-X drive with the OS installer on it to fix your HD or to prep up your new SSD drive.

Here's the steps:

From the other Mac open Disk Utility and delete the FAT32 partition on the thumb drive.

Next using Disk Utility again setup GUID partition mapping and create an extended journaled partition.

Using the OS-X installer install onto the thumb drive the Mac OS. Once done copy over to the thumb drive the OS installer application and shut the system down before removing the thumb drive.

Now insert the thumb drive into your system and hold the option key when you start the system up to get to the Disk Manager to select the thumb drive as the boot disk.

The next action is either to run Disk Utility to try to fix your HD or if you don't want to save anything instead before starting your system up in the last step swap out the HD for your new SSD. And then repeat the process you used to prep up the thumb drive with the SSD.